Adjustable bifocal spectacles

ABSTRACT

Spectacles with adjustable lenses which include a frame with extended arms and bridge, thebridge having track means for holding a lens chassis capable of assuming a plurality of positions relative to frame. The len chassis includes a pair of lens and bridge structure supporting said lens, the bridge structure including a pair of spaced-apart support tubes for holding flexible nylon bushings disposed to fit within said tubes and saId track for movement along said tract relative to said frame. The lens chassis permits different viewing area of the lens to be exposed when the chassis is moved along said track.

Masucci Nov. 6, 1973 ADJUSTABLE BIFOCAL SPECTACLES Primary Examiner-David Schonberg Assistant Examiner-Paul A. Sacher Att0rneyWilliam V. Pesce [57] ABSTRACT Spectacles with adjustable lenses which include a frame with extended arms and bridge, thebridge having track means for holding a lens chassis capable of assuming a plurality of positions relative to frame. The len chassis includes a pair of lens and bridge structure supporting said lens, the bridge structure including a pair of spaced-apart support tubes for holding flexible nylon bushings disposed to fit within said tubes and sald track for, movement along said tract relative to said frame. The lens chassis permits different viewing area of the lens to be exposed when the chassis is moved along said track.

4 Claims, 7 Drawing Figures [76] Inventor: Alan A. Masucci, 1910 University Ave., New York, N.Y. 10453 [22] Filed: Apr. 5, 1972 211 App1.No.: 241,331

52 us. Cl. 351/55, 351/148 [51] Int. Cl G02c 3/00 [58] Field at Search 351/5, 55,148, 107

[56] References Cited UNITED STATES PATENTS 3,425,773 2/1969 Masucci 351/55 2,112,163 3/1938 Kimtnel 351/55 2,184,417 12/1939 Ellestad ...3-51 /55 2,277,726 31/19 42 Splaine 351/55 2,486,881 11/1949 Roth 351/55 ADJUSTABLE BIFOCAL SPECTACLES This invention relates generally to bi-focal spectacles and is particularly directed to adjustable bi-focal spectacles wherein the field of view may be conveniently alterable at will by the user without changing or altering the line of sight of the viewer.

It is an object of the present invention to provide a single, rugged, easily adjustable pair of spectacles wherein the field of view is alterable without changing the line of sight of viewer.

Another-object of the invention is to provide an adjustable pair of spectacles whose lenses may be adjusted to one of two positions to provide two different viewing areas of the lens. I

A still further object of theinvention is to provide adjustable lens which permits smooth relative motionof lens chassis relative to bridge and prevents bending and erraticmotion.

A still further object'of thelens is the elimination of tensional bridge structure of lens chassis thereby eliminating the cost of said spring,'the lubrication therefore, the labor involved-in soldering said spring and the wear and tear and cost of replacing same.

Other-objects and advantages will become apparent from a reading of the specification, and a study of the accompanying drawings in which:

FIG. 1 shows an elevationalview of the spectacles assembly including frame and carriage according 'to'the invention; I

FIG.- 2 shows 'view of a single section of frame and chassis with'lens positioned to lowest downward position; FIG. 3 shows a'sectional view through the line 3 3 ofFlG. 1; s

FlG.-4 shows a sectional view through the line 4- in operable engagement therewith. The tubing'assembly '14, as shown in FIG. 5 comprises a slightly bent tube 19 -and a flexible bushing 21 residing therein and disposed to follow the contour of the tube. Further, the said flexible tubing, composed of nylon or other suitable synthetic fiber or flexible material, contains at the outer extremities annular type flanges 20, 22 to permit the bushing to remain stable'and fixed within the tub- FIG. 6 shows another embodiment of the tubing assembly, and wherein the tubing is representative of a clamp or strap-like member- 23, similarly bent or chassis is moved relative to said frame; The nylon bush- 3 of FIG. 1. However, the track portion of FIG. 7 is ad- 1 FIG. 5 shows partially in section-an elevational view of tube and bushing therein according to' one embodi- .ment of the invention;

7 FIG. 6 shows partially in section an elevational view of a clamp type tube and bushing -therein according another embodiment of the invention; f 4

FIG. 7 shows a sectional view. through the line 3 3 wherein the trackzportion at the upper extremity thereof is attached to the frame."

. Now describing the invention with respect to the various FIGURES, keeping in mind that throughout the specifications like parts will be given the same reference numbers, there is shown particularly in FIG. 1 a pair of spectacles l having'a frame 2 and lens chassis 3 disposed to move relative thereto according to the invention described herein.

In particular, FIG. 1 shows a frame 2 composedof a central bridge portion 4 attached to, on opposing sides,

a pair of extended arms 5 and 6 whose extremes 7 and 8 carry a pair of hinge joints 9 and 10 for pivotally mounting the forward ends of temples, not shown, in a well-known manner. The central bridge member 4 further includes a pair of spaced-apart tracks 11 and 12 for receiving tubing assemblies 13 and 14'fixedly attached to lens chassis 3 along the bridge portion 16 thereof on opposing ends thereof 17 and 18. The said tubing assemblies 13 and 14 are disposed to ride along said track 1 l and 12 to permit relative displacement of lens chassis and frame topermit different fields of view.

In FIG. 3, aviewthrough the line 3 3 of FIG. 1 shows in particular the track 12 and tubing assembly 14 ing, being relatively smooth has a friction co -efficient sufficient to prevent sliding of chassis relative to frame, unless there is actual'force used in moving one relative to the other. Hence, there is smooth motion when required between frame and chassis,.with stability of mobilitywhen positioning is finalized. r i FIG. 7, as in FIG. 3, is a'view through the line 3 hered to "the frame 2 at both extremities 29, 30 to permit a sturdier support, especially where excessive use or movement is anticipated between chassis and frame. However, the chassis and frameare first mounted prior to the attachment of the track at the extremities else assembly could not be possible. The frame also has attached thereto, below the track portions of said frame, a pair of nose rests 30, 31 attached to said frame, and depending therefrom for the usual purpose.

- Referring to FIGS. 1 and 2, it may be seen thatthe chassis relative to frame are displaced in different positions to afford the user different fields of view. In particular, FIG. 1-represents the maximum displacement of chassis and frame permitting the user a view through the upper portion of lens. Conversely, FIG. 2 permits the user a view through the lower portion of lens. However, it may be appreciated that various fields of view in between these two extremes is possible by simply manipulating and adjusting the movements between frame and chassis. Hence, simple rapid, smoothand positive means is provided for adjusting the viewing area of the lens to permit the viewer to use different field of view of the'lens without changing or altering his line-of-sight which can be cumbersome and sometimes hazardess. The user is also permitted the easy facility of adjustment without any slippage or bumping, or

other unwanted motions can take place.

While the invention has been described and illustrated with respect to certain particular preferred embodiments which give satisfactory results, it will be un- 2. Spectacles according to claim 1 and wherein said bushing means are composed of acrylic flexible fibers material disposed to flex and follow the contour of said tracks.

3. Spectacles according to claim 2 and wherein said acrylic fiber material is nylon.

4. Spectacles with adjustable lens according to claim 1 and wherein said spaced-apart track members are each disposed to having their extremities fixedly attached to said frame. 

1. Spectacles with adjustable lenses comprising: a. a frame including a centrally disposed brIdge having a pair of spaced-apart track members attached thereto, b. a lens chassis including a centrally disposed bridge having a pair of spaced-apart holding tubes fixedly attached thereto vertically oriented, c. bushing means within said tubes for frictionally mounting said chassis to the frame via said track members to facilitate the relative free movement of chassis and frame to permit different fields of view.
 2. Spectacles according to claim 1 and wherein said bushing means are composed of acrylic flexible fibers material disposed to flex and follow the contour of said tracks.
 3. Spectacles according to claim 2 and wherein said acrylic fiber material is nylon.
 4. Spectacles with adjustable lens according to claim 1 and wherein said spaced-apart track members are each disposed to having their extremities fixedly attached to said frame. 